Frame for window and door screens.



A. H. MIX. FRAME FOR WINDOW AND DOOR SCREENS.

APPLICATION FILE'D APR.5, 1909.

Patented Aug. 3, 1909.

2 SHEETS-SHEET 1'.

I I I 7 I II! 1|] I lllll I I I ll I I I I I ll f I 1 A. H. MIX.

FRAME FORWI NDOW AND DOOR SCREENS. APPLIGATION FILED APR.5,1909.

2 SHEETS-SHEET 2.

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NITED STATES PATENT OFFICE.

ALLEN H. MIX, OF ARLINGTON, VERMONT, ASSIGNOR TO PORTER SCREENMANUFACTURING COMPANY, OF BURLINGTON, VERMONT.

FRAME FOR WINDOW AND DOOR SCREENS.

T 0 all whom it may concern:

Be it'known that I, ALLEN H. MIX,.a citizen of the United States,residing in the city of Arlington, county of Bennington, State ofVermont, have invented a new and useful Improvement. in Frames forWindow and Door Screens and for. other Purposes, of which thefollowingis a specification.

This invention has been devised with more particular reference to itsuse in connection with the wooden frames of window screens and the like,and it is in that connection that I shall describe it, without, however,limiting myself to its usein that connection.

The invention has to do with the. corner construction of the framethatis to say the joint by which the meeting ends of the end rails and siderails of the frame are united; and theobject is to obtain a cheap,effective and durable joint of this-character.

I shalli'irst describe the improvementi'in connection with theaccompanying drawings, forming part of this specification, and shallthen point out more particularly inthe claims that which I believe to benew andof my own invention.

In'the drawingsFigure 1 is a'perspective view of part of a window screenembodying my improvementthe same embracing. the meeting ends of twoadjacent rails, and the screen fabric held by the same. Fig.2 is a viewof the same parts with the rail ends separated from one another, andthemolding on the rabbeted face of the vertical rail section alsoremoved, so as to show the construction of the joint. Fig. 3 is a planof the same parts fitted together, but with the molding of the verticalrail section removed, and: the other molding partly broken away. Fig. 4is a view of the tongued inner face of said molding. Fig. 5 is a view,similar to Fig. 3, of amodification in which the locking tongue isseparate from the molding. Fig. 6 isa view of the inner face of thevertical molding in this modification.

In the drawing, A is the one rail section, and B is the other. Each railonits inner edge is rabbeted as at a, to form a shelf for reception ofthe edge of the screen fabric X; and in the face of the shelf or rabbetis formed a longitudinal groove 5;

C is the molding which is fitted to therebbet' over the edge of the wirefabric, and is there tacked to the body of the rail, thus Specificationof Letters Patent.

Application filed. April 5, 1909.

Patented Aug. 8, 1909.

Serial No. 488,058.

inner face. of the molding. is a longitudinal tongue 0 which enters thegroove 12 in the rail, forcing the screen fabric into said groove, andthus fastening said fabric more securely in the screen. Thus far thereis nothing essentially new in the. construction.

The joint between the two rails A B isv a square mortise and tenonjoint, thetenon d being-on the rail A, and the Inortise'c in the rail B.In the face of the rail A opposite that in which the rabbet a is formed,is a transverse recessf formed in the edge of the rail adjoining thetenon,having. its bottom flush with the corresponding face of the tenonand its rear wall undercut as at f.

The mortise e in rail B, adjoins the end of the shelf'a. From the pointwhere this shelf terminates, the rabbet is deepened by the thickness ofthe tenon d,.so as to bring the face of this recessedportion g flushwith the farther wall of the mortise, the near wall of which is flushwith the shelf or rabbet a. The part 9 forms a tongue which, when thejoint is closed, fills the recess f in the other rail and is providedwith abeveled edge g to match and interlock with the undercut wall f ofsaidrecessa When the tenon (Z is fitted to its mortise, its near facewill be flush with the rabbet a. In the face of that portion of thereduced part. of the rail which adjoins the tenon is formed a groove 5which extends from the inner edge of the rail in a direction crosswiseof the tenon, and is so located that when the tenon is housed in itsmortiseit (the groove 1)) will be outside of the mortise and openeruncovered. This groove 6 in the one rail is designed to be engaged whenthe joint is closed by a tongue or looking. strip attached to the otherrail, so as to prevent the joint from drawing apart.

The tongued molding C of rail B is, in the present instance utilized assuch a locking strip. To this-end the groove 6, is so located in itsrail A that it is on the prolongation of the groove 6, in rail B, whenthe tenon is home in its mortise. The molding O of the rail B overlapsthat portion of railA which contains groove Z) and is provided on itsinner face with. a tongue in this instance an extension of tongue cwhichenters groove 5, thus locking together the. two meeting ends of therails: against any drawing apart of the mortise and tenon joint. holdingthe screen fabric in place On the place by small nails, as usual. Thejoint between the meeting ends of the two moldings or rails A, B, isrepresented by a miter joint; but the same construction, so far as thelocking of the two rails together by the molding on the one railentering a groove Z) in the other rail, can be employed with a square,instead of a miter, joint.

The interlocking of the undercut f on the one rail with the bevel edgetongue 9 on the other rail, is not indispensable; but I prefer itinasmuch as it stiifens and strengthens the joint and takes off from thetenon (1 strains which otherwise might come upon it.

The screen fabric X, as shown in Fig. 3, extends over the groove 1) inthe tenoned rail .A, and is forced down into that groove by the tongueon the molding appropriate to that rail. On the mortised rail B, thescreen fabric extends up to, but not over, the groove Z) therein, so asnot to interfere with the actionofthe locking tongue. The screen fabricon this edge is of course held by the same nails which secure themolding in place. This is the preferred arrangement. But, of course, thescreen fabric can project, on all its edges, over the grooves b of theframe rails if desired.

Obviously the structural embodiment of the locking tongue device forpreventing the drawing apart of the members of the mortise and tenonjoint, may be variously modified without departure from my invention.For instance, in the modification shown in Figs. 5, 6, the lockingtongue consists of a rod or bar 0 (preferably of metal) which isseparate from the molding. It is conveniently made of round wire of asize to fit and fairly fill the grooves b b to the extent to which itoccupies them. In the present instance the locking tongue is bent atabout its middle so that the two limbs will stand at right angles withone another. The one limb fits in the groove 1) of the mortised rail andthe cross groove 1), in the tenoned rail, and the other limb thenceextends into the longitudinal groove 1) in the tenoned rail, acting as atongue to hold the edge of the wire in the said groove. In thisconstruction the tongues on both of the moldings, are duly shortened (asshown for one of the moldings in Fig. 6) so' as not to interfere withthe separate locking tongue 0, the moldings when in place acting tocover, as well as to hold in place, said locking tongue.

If desired, the limb of the locking tongue 6 which enters the groove 12in the tenoned rail A can be dispensed with, or severed from the otherlimb, at the dotted line 0 Fig. 5, the locking tongue in this caseconsisting of a straight metal bar extending from the groove 6 in themortised rail into the cross groove 6 in the tenoned rail.

That the locking tonguewhether forming part of the molding or notcan bethus conveniently and efficiently applied, is due primarily to the factthat the locxing grooves for said tongue in the meeting ends of therails, are formed in the face of the rails beyond the mortise and tenonjoint, so that they remain open and uncovered after the joint is closed,in a position to ermit the locking tongue to be fitted or laid directlyinto both of them without any lengthwise sliding movement, such as takesplace when a dowel pin is driven into a hole.

Having described my improvement an the best way now known to me ofcarrying the same into ractical effect, I state in conclusion that l donot restrict myself narrowly to the structural details herein shown andspecified in illustration of the invention, since manifestly the samecan be varied in a number of respects without departure from theprinciple of the invention. But

W hat I claim herein as new and desire to secure by Letters Patent is asfollows:

1. The rails A B having their meeting ends united by a mortise and tenonjoint, that portion of the tenoned rail beyond the tenon having in itsface a groove which extends from its inner edge in a direction crosswiseof the tenon, and remains open after the joint is closed, and a lockingtongue secured to the mortised rail and projecting into and engagingsaid cross groove in the tenoned rail, substantially as and for thepurposes hereinbefore set forth.

2; The rails A B having their meeting ends united by a mortise and tenonjoint and having on their inner edges longitudinally grooved rabbets,the tenoned rail formed also with a groove crosswise of the tenon and onthe prolongation of the longitudinal groove in the rabbet of themortised rail, in combination with a locking tongue fitting and held inthe longitudinal groove in the mortised rail and projecting into thecross groove in the tenoned rail, and moldings secured in the rabbets,substantially as and for the purposes hereinbefore set forth.

3. The rails A B having their meeting ends united by a mortise and tenonjoint and rabbeted on their inner edges, the tenoned rail having agroove 6 crosswise of the tenon, and moldings secured in the rabbets,the molding on the mortised rail overlapping the portion of theadjoining rail in which the groove 1) is formed and being provided witha projection or tongue to enter and engage said groove.

4. The rails A B having their meeting ends united by a mortise and tenonjoint and having on their inner edges rabbets a formed with grooves b,the tenoned rail having a groove 6, crosswise of the tenon and on theprolongation of the groove 1) in the rabbet in the adjoining rail, incombination with moldings secured in the rabbets, provided with tonguesto enter the grooves b therein,

the molding on the mortised rail overla ping the portion of theadjoining rail in whic the cross groove 7) is formed, and provided witha locking tongue to engage said groove.

5. The rail A formed with rabbet 11 having groove 1) therein, tenon d,cross-groove b and undercut recessed portion f f, and the rail B formedwith a rabbet at having groove 1) therein, mortise e to receive thetenon d, and a beveled tongue 9 g to fill and interlock with theundercut recessed portion f f of the rail A when the tenon is home inthe mortise, in combination with tongued mold: ings secured in therabbets in the rails and engaging the grooves b therein, the molding onrail B also overlapping the portion of rail A in which the groove 1) isformed and engaging said groove.

In testimony whereof I afiix my signature in presence of two witnesses.

ALLEN H. MIX; .Vitnesses:

O. E. ADAMs, SYLvEsTER O. DEMING.

